Question $13$

$2$ pts

What is the average number of customers in the line?

$($Choose the closest answer$)$

$2\mathrm{.}90$

$6\mathrm{.}20$

$5\mathrm{.}89$

$5\mathrm{.}12$

$3\mathrm{.}07$

$8\mathrm{.}71$

$2\mathrm{.}17$

$3\mathrm{.}82$

$4\mathrm{.}10$

$5\mathrm{.}85$